Effect of the tetrahedral distortion on the electronic properties of iron-pnictides

Abstract

We study the dependence of the electronic structure of iron pnictides on the angle formed by the arsenic-iron bonds. Within a Slater-Koster tight binding model which captures the correct symmetry properties of the bands, we show that the density of states and the band structure are sensitive to the distortion of the tetrahedral environment of the iron atoms. This sensitivity is extremely strong in a two-orbital (d_xz, d_yz) model due to the formation of a flat band around the Fermi level. Inclusion of the d_xy orbital destroys the flat band while keeping a considerable angle dependence in the band structure.

5 pages, including 5 figures. Fig. 5 replaced. Minor changes in the text

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Cited by in corpus (7)

• Electronic Structure of the BaFe${}_2$As${}_2$ Family of Iron Pnictides
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• Neutron and ARPES Constraints on the Couplings of the Multiorbital Hubbard Model for the Pnictides
• Magnetic and Metallic State at Intermediate Hubbard U Coupling in Multiorbital Models for Undoped Fe Pnictides
• Tight binding model for iron pnictides
• Magnetic order in orbital models of the iron pnictides
• Spin-orbital interplay and topology in the nematic phase of iron pnictides